J/ApJ/648/375 Araucaria: NGC 3109 Cepheids JK phot. (Soszynski+, 2006) ================================================================================ The Araucaria Project: distance to the Local Group galaxy NGC 3109 from near-infrared photometry of Cepheids. Soszynski I., Gieren W., Pietrzynski G., Bresolin F., Kudritzki R.-P., Storm J. =2006ApJ...648..375S ================================================================================ ADC_Keywords: Stars, variable ; Photometry, infrared Keywords: Cepheids - galaxies: distances and redshifts - galaxies: individual (NGC 3109) - infrared: stars Abstract: We present near-infrared J- and K-band photometry of 77 Cepheid variables in the Local Group galaxy NGC 3109. Combining our data with the previously published optical V- and I-band photometry of Cepheids in this galaxy, we derive an accurate distance and interstellar reddening toward NGC 3109. Description: We used deep J- and K-band images recorded with the 8.2m ESO Very Large Telescope equipped with the Infrared Spectrometer and Array Camera (ISAAC). Obverations were made on six nights between 2004 January 31 and February 19. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 60 152 Journal of the individual J and K observations of the NGC 3109 Cepheids table2.dat 48 77 Intensity Mean J and K Magnitudes for 77 Cepheids in NGC 3109 -------------------------------------------------------------------------------- See also: J/ApJ/648/366 : Araucaria: NGC 3109 Cepheids VI phot. (Pietrzynski+, 2006) J/ApJ/659/1198 : Araucaria: NGC 3109 blue supergiants (Evans+, 2007) Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 3 A3 --- --- [cep] 4- 6 I03 --- cep Cepheid number (G1) 8- 20 F13.5 d HJDJ ? Heliocentric Julian Date of J band observation 22- 27 F6.3 mag Jmag ? The J band magnitude 29- 33 F5.3 mag e_Jmag ? The 1{sigma} error in Jmag 35- 47 F13.5 d HJDK ? Heliocentric Julian Date of K band observation 49- 54 F6.3 mag Kmag ? The K band magnitude 56- 60 F5.3 mag e_Kmag ? The 1{sigma} error in Kmag -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 3 A3 --- --- [cep] 4- 6 I03 --- cep Cepheid number (G1) 8- 15 F8.5 d Per Period 17- 22 F6.3 mag JmagAvg ?=- Mean J magnitude 24- 28 F5.3 mag e_JmagAvg ?=- rms uncertainty in 30- 35 F6.3 mag KmagAvg Mean K magnitude 37- 41 F5.3 mag e_KmagAvg rms uncertainty in 43- 48 A6 --- Rem Remarks -------------------------------------------------------------------------------- Global Notes: Note (G1): Stars designated [PGU2006] cepNNN in Simbad. History: From electronic version of the journal ================================================================================ (End) Greg Schwarz [AAS], Patricia Vannier [CDS] 17-Jul-2008